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PatchSiren cyber security CVE debrief

CVE-2026-39496 YayCommerce CVE debrief

A Blind SQL Injection vulnerability was discovered in the YayMail plugin, affecting versions from n/a through <= 4.3.3. This issue, tracked as CVE-2026-39496, has a CVSS score of 7.6 and is classified as HIGH severity. The vulnerability allows attackers to inject malicious SQL code into the plugin's database, potentially leading to unauthorized data extraction or modification. Users of the YayMail plugin, particularly those using versions prior to an updated version beyond 4.3.3, should be aware of this vulnerability and take steps to mitigate the risk. It is essential to update the plugin to a version that addresses this vulnerability and implement additional security measures, such as web application firewalls and regular database monitoring, to prevent and detect potential attacks.

Vendor
YayCommerce
Product
YayMail
CVSS
HIGH 7.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-24
Advisory published
2026-04-08
Advisory updated
2026-07-24

Who should care

Users of the YayMail plugin, particularly those using versions prior to an updated version beyond 4.3.3, should be aware of this vulnerability and take steps to mitigate the risk.

Technical summary

The CVE-2026-39496 vulnerability is a Blind SQL Injection issue in the YayMail plugin. This type of vulnerability occurs when an attacker can inject malicious SQL code into a web application's database in order to extract or modify sensitive data. The vulnerability's CVSS vector is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L, indicating that it can be exploited remotely with high privileges, leading to high impact on confidentiality.

Defensive priority

High priority should be given to updating the YayMail plugin to a version that addresses this vulnerability.

Recommended defensive actions

  • Update the YayMail plugin to a version beyond 4.3.3.
  • Implement web application firewalls (WAFs) to filter and block malicious SQL injection attempts.
  • Regularly monitor and audit database activities for suspicious queries.
  • Limit database privileges to the minimum required for the application to function.
  • Use prepared statements with parameterized queries to prevent SQL injection.

Evidence notes

The CVE record was published on 2026-04-08T09:16:23.953Z and was last modified on 2026-07-24T21:10:00.143Z. The NVD entry is currently Deferred. Evidence is based on official CVE and NVD records, as well as a mitigation reference from Patchstack.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-08T09:16:23.953Z and has not been modified since then. The NVD entry is currently Deferred.